<template>
	<view>
		<button @click="searchBle">Search Bluetooth</button>
		<view style="margin-top: 30upx;" :key="index" v-for="(item,index) in devices">
			<button style="width: 400upx; color: #0081FF;" @click="onConn(item)">{{item.name}}</button>
		</view>
		<!-- <textarea auto-height placeholder-style="color:#F76260" placeholder="请输入票据信息" v-model="piaojuText" />
		<button style="margin-top: 100upx;" @click="senBleLabel2()">票据打印</button>
 -->
	</view>


</template>

<script>

	export default {
		data() {
			return {
				devices: [],
				currDev: null,
				connId: '',
				piaojuText: '',
				tableDomId: '',
				tableImgPath: '',
				canvasWidth: 800,
				canvasHeight: 600,
				msg: ''
			}
		},
		watch: {
			msg() {
				uni.showToast({
					title: this.msg
				})
			}
		},
		onReady() {
			this.renderFinish()
		},
		methods: {
			destroyed: function() {
				console.log("destroyed----------")
				if (this.connId != '') {
					uni.closeBLEConnection({
						deviceId: this.connId,
						success(res) {
							console.log(res)
						}
					})
				}
			},
			searchBle() {
				var that = this
				console.log("initBule")

				uni.openBluetoothAdapter({
					success(res) {
						console.log("打开 蓝牙模块")
						console.log(res)
						that.onDevice()
						uni.getBluetoothAdapterState({
							success: function(res) {
								console.log(res)
								if (res.available) {
									if (res.discovering) {
										that.stopFindBule()
									}
									console.log("开始搜寻附近的蓝牙外围设备")
									uni.startBluetoothDevicesDiscovery({
										success(res) {
											console.log(res)
										}
									})
								} else {
									console.log('本机蓝牙不可用')
								}
							},
						})
					}
				})
			},
			onDevice() {
				console.log("监听寻找到新设备的事件---------------")
				var that = this
				//监听寻找到新设备的事件
				uni.onBluetoothDeviceFound(function(devices) {
					console.log('--------------new-----------------------' + JSON.stringify(devices))
					var re = JSON.parse(JSON.stringify(devices))
					console.log(re.devices[0].name + "  " + re.devices[0].deviceId)
					let name = re.devices[0].name
					if (name != "未知设备") {
						let deviceId = re.devices[0].deviceId
						that.devices.push({
							name: name,
							deviceId: deviceId,
							services: []
						})
					}
				})
			},

			stopFindBule() {
				console.log("停止搜寻附近的蓝牙外围设备---------------")
				uni.stopBluetoothDevicesDiscovery({
					success(res) {
						console.log(res)
					}
				})
			},
			onConn(item) {
				var that = this
				console.log("连接蓝牙---------------" + item.deviceId)
				let deviceId = item.deviceId
				uni.createBLEConnection({
					deviceId: deviceId,
					complete(res) {
						if (res.errMsg == "createBLEConnection:ok") {

							console.log("连接蓝牙-[" + item.name + "]--成功")
							that.connId = deviceId;
							that.currDev = item
							setTimeout(function() {
								that.getBLEServices(deviceId)
							}, 3000)
							uni.showToast({
								title: '连接成功',
								icon: 'success',
								duration: 2000
							})
						} else {
							console.log(res)
						}
						//连接成功 关闭搜索
						that.stopFindBule()
					},
				})

			},

			getBLEServices(_deviceId) {
				var that = this;
				let deviceId = _deviceId
				console.log("获取蓝牙设备所有服务(service)。---------------")

				uni.getBLEDeviceServices({
					// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
					deviceId: deviceId,
					complete(res) {
						console.log(res)
						let serviceId = ""
						for (var s = 0; s < res.services.length; s++) {
							console.log(res.services[s].uuid)
							let serviceId = res.services[s].uuid
							uni.getBLEDeviceCharacteristics({
								// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
								deviceId: deviceId,
								// 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取
								serviceId: serviceId,
								success(res) {
									var re = JSON.parse(JSON.stringify(res))

									console.log('deviceId = [' + deviceId + ']  serviceId = [' +
										serviceId + ']')
									for (var c = 0; c < re.characteristics.length; c++) {
										if (re.characteristics[c].properties.write == true) {
											let uuid = re.characteristics[c].uuid
											console.log(' deviceId = [' + deviceId + ']  serviceId = [' +
												serviceId + '] characteristics=[' +
												uuid)
											const options = {
												deviceId: deviceId,
												serviceId: serviceId,
												characteristics: uuid
											}
											console.log(options)
											uni.setStorageSync('userInfo', options)
											for (var index in that.devices) {

												if (that.devices[index].deviceId == deviceId) {
													that.devices[index].services.push({
														serviceId: serviceId,
														characteristicId: uuid
													})
													break
												}

											}

										}
									}
								}
							})
						}
					},
					fail(res) {
						console.log(res)
					},
				})
			},
			senBlData(deviceId, serviceId, characteristicId, uint8Array) {
				console.log('************deviceId = [' + deviceId + ']  serviceId = [' + serviceId +
					'] characteristics=[' + characteristicId + "]")


				var uint8Buf = Array.from(uint8Array);

				function split_array(datas, size) {
					var result = {};
					var j = 0
					if (datas.length < size) {
						size = datas.length
					}
					for (var i = 0; i < datas.length; i += size) {
						result[j] = datas.slice(i, i + size)
						j++
					}
					//result[j] = datas
					console.log(result)
					return result
				}
				var sendloop = split_array(uint8Buf, 20);
				// console.log(sendloop.length)
				function realWriteData(sendloop, i) {
					var data = sendloop[i]
					if (typeof(data) == "undefined") {
						return
					}
					//console.log("第【" + i + "】次写数据"+data)
					var buffer = new ArrayBuffer(data.length)
					var dataView = new DataView(buffer)
					for (var j = 0; j < data.length; j++) {
						dataView.setUint8(j, data[j]);
					}
					uni.writeBLECharacteristicValue({
						deviceId,
						serviceId,
						characteristicId,
						value: buffer,
						success(res) {
							console.log('发送成功', i)
							setTimeout(() => {
								realWriteData(sendloop, i + 1);
							}, 100)
							//realWriteData(sendloop, i + 1);

						},
						fail(e) {
							console.log('发送数据失败')
							console.log(e)
						}
					})
				}
				var i = 0;
				realWriteData(sendloop, i);
			},
			
			senBleLabel2() {
				//票据模式
				let deviceId = this.currDev.deviceId;
				let serviceId = this.currDev.services[0].serviceId;
				let characteristicId = this.currDev.services[0].characteristicId;
				var command = esc.jpPrinter.createNew()
				command.init()
				command.setText(this.piaojuText);
				command.setPrintAndFeedRow(2)
				this.senBlData(deviceId, serviceId, characteristicId, command.getData())
			},
			
		}
	}
</script>

<style>

</style>
